CN102418933B - Corrosion-resistant chimney with cylinder wall heating device - Google Patents
Corrosion-resistant chimney with cylinder wall heating device Download PDFInfo
- Publication number
- CN102418933B CN102418933B CN201210011677.6A CN201210011677A CN102418933B CN 102418933 B CN102418933 B CN 102418933B CN 201210011677 A CN201210011677 A CN 201210011677A CN 102418933 B CN102418933 B CN 102418933B
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- flue gas
- chimney
- heat transfer
- transfer tube
- urceolus
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- 230000007797 corrosion Effects 0.000 title abstract description 20
- 238000005260 corrosion Methods 0.000 title abstract description 20
- 238000010438 heat treatment Methods 0.000 title abstract description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000003546 flue gas Substances 0.000 claims abstract description 76
- 238000012546 transfer Methods 0.000 claims abstract description 55
- 238000006477 desulfuration reaction Methods 0.000 claims description 28
- 230000023556 desulfurization Effects 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 12
- 239000005439 thermosphere Substances 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 17
- 238000010276 construction Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000011229 interlayer Substances 0.000 description 10
- 210000001364 upper extremity Anatomy 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 241000628997 Flos Species 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000001464 adherent effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Chimneys And Flues (AREA)
Abstract
The invention discloses a corrosion-resistant chimney with a cylinder wall heating device and belongs to the field of wet desulphurization wet flue gas chimneys. In order to solve the problem that the wet flue gas corrodes an inner wall of the chimney, the corrosion-resistant chimney comprises an outer cylinder and an inner cylinder, wherein at least one group of heat transfer pipes are arranged between the outer cylinder and the inner cylinder. High-temperature hot flue gas before desulphurization is directly introduced into a part between the outer cylinder and the inner cylinder to heat the cylinder wall through a pipeline, or heat of the high-temperature hot flue gas before desulphurization is transferred to the part between the outer cylinder and the inner cylinder through liquid of a heat exchanger, so that corrosion of the wet flue gas on a liner and the outer cylinder of the chimney is completely avoided. New heat sources and related equipment are not needed to be added, and the device has a simple structure and is low in overall construction cost. Power is only consumed to maintain low-speed flow of the hot flue gas or hot liquid in the pipeline, and the operating cost is low.
Description
Technical field
The present invention relates to wet desulphurization wet flue gas chimney, is a kind ofly not produce water stainly, and urceolus and inner sleeve be the Novel chimney of corrosion not.
Background technology
After wet desulphurization, the flue gas water content increases, and temperature reduces, and is to cause the chimney lining corrosion containing sour condensed water, and infiltrates by liner the basic factor that urceolus causes the structure hidden danger containing sour water.In the face of this problem, still do not find the way of radical cure at present.A kind of technological approaches is to add heat exchanger (GGH) after desulfurization preferably, improves the cigarette temperature and makes it on acid is revealed, and prevents that condensation from occurring.Although this technology has been caught the principal contradiction of chimney corrosion, there is the problem of three aspects: in GGH.
1. heat and be generally 80 ℃, still be not enough to prevent the smoke condensation phenomenon, the chimney corrosion also happens occasionally;
2.GGH equipment investment is large, smoke gas flow through the time loss in head large, operating cost is high.Heat exchange element palpus periodic cleaning and replacing, maintenance cost is also very high.
3. that causes chimney corrosion just pastes that fraction wet flue gas that barrel flows, the GGH of configuration but to all up to per hour the flue gas of millions of cubic metres is obviously very unreasonable, very uneconomical, the technical concept backwardness.
Therefore, seek new technological approaches, solve the etching problem that at present a large amount of wet flue gas chimneys occur, the potential safety hazard of radical cure chimney operation is one and very urgently expects the Important Project actual subject solved.
Summary of the invention
Can not get for a long time the basic engineering reality solved for wet flue gas chimney etching problem, the present invention aims to provide a kind of Anti-corrosive chimney that is provided with the barrel heater, this Anti-corrosive chimney, by the barrel heater is set, can thoroughly solve the problem that inner core and urceolus are corroded by wet flue gas.
To achieve these goals, the technical solution adopted in the present invention is: the described Anti-corrosive chimney that is provided with the barrel heater, comprise urceolus and inner core, and its design feature is to be provided with at least one group of heat transfer tube between described urceolus and inner core.
The present invention utilizes the warm flue gas of height before wet desulphurization, by air-introduced machine, the warm flue gas of height is incorporated in heat transfer tube, or the heat of the warm flue gas of height before desulfurization is passed through to the fluid transport of the heat exchanger in the hot flue gas flue before desulfurization between urceolus and inner core, interlayer between urceolus and inner core is heated, simultaneously by urceolus and the heating of inner core barrel, heat exchange has fully promoted the temperature of chimney inner sleeve, eliminate the primary condition of wet flue gas dewfall, prevented the corrosion failure of liner.Even there is a small amount of flue gas to enter the interlayer between urceolus and inner core, because the interlayer temperature is also enough high, a small amount of wet flue gas is vaporized, and does not form the corrosion failure to urceolus and inner core.
As one of preferred version, described heat transfer tube is provided with air-introduced machine, and this heat transfer tube advances mouth and is connected with the hot flue gas flue before desulfurization by pipeline, and this heat transfer tube outlet flue is connected with the hot flue gas flue before desulfurization by pipeline, forms closed circuit; Described heat transfer tube is provided with stop valve, described stop valve for the unlatching of carrying out hot flue gas, close and the hot flue gas flue in chimney left and right for the function such as hot-swap.
Concrete structure is: the hot flue gas before described desulfurization is connected with the mouth that advances of described heat transfer tube by pipeline by flue.Described heat transfer tube advance mouth and outlet flue all is arranged near the floss hole entrance of chimney, can be floss hole entrance top near described, and apart from floss hole upper limb 0.8m～1.5m place.The outlet flue of described heat transfer tube is connected with the hot flue gas flue before desulfurization with pipeline with stop valve via air-introduced machine.
As another kind of preferred version, described heat exchanger is positioned to desulfurization hot flue gas flue before, by the liquid in the warm flue gas heat exchanger of height, be preferably water, can certainly be the liquid that other thermal conductivity is good, then by pump, the water after heating is circulated in heat transfer tube, interlayer between urceolus and inner core is heated, simultaneously by urceolus and the heating of inner core barrel, heat exchange has fully promoted the temperature of chimney inner sleeve, eliminate the primary condition of wet flue gas dewfall, prevented the corrosion failure of liner.Even there is a small amount of flue gas to enter the interlayer between urceolus and inner core, because the interlayer temperature is also enough high, a small amount of wet flue gas is vaporized, and does not form the corrosion failure to urceolus and inner core; And the low-temperature flue gas after the liquid in heating heat exchanger enters in chimney internal cylinder by after desulfurizer.
While adopting water to do circulating fluid, preferably adopt boiled water, in order to avoid fouling in heat transfer tube affects heat-conducting effect.
In the present invention, described heat transfer tube is provided with stop valve, described stop valve for the unlatching of carrying out hot liquid, close and the hot flue gas flue in chimney left and right for the function such as hot-swap.
Concrete structure is: after the hot flue gas before described desulfurization passes through heat exchanger by flue, and the liquid in heating heat exchanger, described heat exchanger is connected with inlet and the liquid outlet of described heat transfer tube respectively.By pump, the liquid in heat transfer tube is circulated, the heat of the warm flue gas of height before desulfurization is transferred between urceolus and inner core, heating chimney wall, thus prevent the wet flue gas dewfall in chimney.
Further.Above-mentioned inner core is preferably inner steel lining, further, is provided with the thermal insulation separation thermosphere between described inner steel lining and urceolus, and described heat transfer tube is arranged in the gap between this thermal insulation separation thermosphere and inner steel lining.
Described inner core can be also the brick setting corrosion-proof lining, between described urceolus and inner core, is provided with gap, and described heat transfer tube is arranged in this gap, and described outer tube inner wall surface is provided with the thermal insulation separation thermosphere.
According to the chimney operating condition, above-mentioned heat transfer tube preferably arranges 1～10 group, and more preferably two groups, three groups or four groups, in order to strengthen the heat-transfer effect of hot flue gas to barrel, described heat transfer tube is provided with radiation cooling plate/sheet and the coating of strengthening heat exchange.
In order to improve the heating effect of heat transfer tube road to barrel, above-mentioned heat transfer tube road extends to chimney top from the floss hole upper limb, then returns to the circuit system of complete, forms inner core high efficiency heating on a large scale.
In order to prevent and weaken flowing containing acid fume gas is adherent in inner core, the inwall of described inner core is provided with interior thorax helix.
By said structure, principle of the present invention is the high-temperature flue gas thermal source that utilizes desulfurization front, by driving and control device, the heat of high-temperature gas is transferred in the gap between the chimney inner/outer tube, increase substantially clearance space and lining temperature, thereby heating chimney wall has prevented the dewfall generation, fundamentally removed the key factor that causes chimney lining corrosion, thus corrosion not.
Even enter the gap between the chimney inner/outer tube in the situation that wet flue gas occurs, because clearance space has been heated to suitable temperature, entering wet flue gas wherein can dewfall, can the infiltrate urceolus does not form water stainly yet, causes the overcoat corrosion failure.The clearance air interlayer of heating has formed effective protection that urceolus is not seeped water and corrodes.
Compared with prior art, the invention has the beneficial effects as follows: the thermal source of this device is taken from the high-temperature flue gas after boiler combustion, does not add new equipment, and device forms simple, and overall cost is low.The low speed that power consumption just maintains hot flue gas in pipeline or hot liquid flows, and operating cost is very low.
What this device adopted is thoroughly to remove the basic factor that causes the chimney corrosion, the Active Anticorrosion technical thought of disconnected its root.With the passive aseptic technic of current employing, as corrosion-inhibiting coating, paste the vitrified tile product, use titanium steel plate, frp linings etc. are compared, have cost low, effective, construct and keep in repair technology and the economic advantages significantly such as easy, easy to implement.This technology both can be used for traditional newly-built chimney and chimney transformation, also can be used in the supporting enforcement without rotten dust-collecting energy-saving chimney.
The present invention sends in the pipeline that is in interlayer between the chimney inner/outer tube by the high-temperature flue gas before desulfurization by air-introduced machine and valve, or the heat of the warm flue gas of height before desulfurization is passed through to the fluid transport of heat exchanger between urceolus and inner core, this ventilation or fluid-through tube road, from the through chimney top of chimney bottom, then return to the circuit system of complete.Enter the front pipeline laying heat-insulation layer insulation of chimney, the pipeline in gap is provided with radiation cooling plate/sheet and coating.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
The accompanying drawing explanation
Fig. 1 is the structure principle chart of an embodiment of the present invention;
Fig. 2 is the A-A profile of Fig. 1;
Fig. 3 is the structure principle chart of the another kind of embodiment of the present invention;
Fig. 4 is the B-B profile of Fig. 3;
Fig. 5 is that the present invention utilizes the schematic diagram of high-temperature flue gas heating barrel by the heat transfer tube road;
Fig. 6 is that the present invention utilizes the schematic diagram of high-temp liquid heating barrel by the heat transfer tube road.
In the drawings
The 1-urceolus; The 2-inner steel lining; 3-thermal insulation separation thermosphere; The 4-heat transfer tube; The 5-corrosion-proof lining; Thorax helix in 6-; The 7-air-introduced machine; The 8-stop valve; Hot flue gas flue before the 9-desulfurization; The 10-inner core; The 11-desulfurizer; 12-radiation cooling plate/sheet; 13-is warm flue gas/liquid line goes out (entering) total mouthful; The 14-heat exchanger; The 15-pump; Hot flue gas/the liquid flow direction of F-.
The specific embodiment
A kind of Anti-corrosive chimney that is provided with the barrel heater, chimney height 240m, as illustrated in fig. 1 and 2, it comprises urceolus 1 and inner core 10; Wherein urceolus 1 is reinforced concrete structure, and described inner core 10 is inner steel lining 2 and thermal insulation separation thermosphere 3.As shown in Figure 5, be provided with three groups of heat transfer tubes between described urceolus 1 and inner core 10, hot flue gas in heat transfer tube before the access desulfurization, the inlet end of described heat transfer tube and outlet side all are arranged on urceolus flue entrance top, and the hot flue gas in described heat transfer tube road 4 is taken from the hot flue gas flue 9 before desulfurization.The mouth that advances of heat transfer tube 4 passes through air-introduced machine 7 by pipeline and is connected with the hot flue gas flue 9 before desulfurization with stop valve 8, and the outlet flue of this heat transfer tube 4 is the hot flue gas flue 9 before stop valve 8 is back to desulfurization by pipeline, forms high warm flue gas recirculation loop.Be provided with thermal insulation separation thermosphere 3 between described inner steel lining 2 and urceolus 1.Described heat transfer tube is arranged in the gap between this thermal insulation separation thermosphere 3 and inner steel lining, and two total mouth of coming in and going out is separately positioned on left and right flue entrance upper limb 1m height and position.Described heat transfer tube 4 extends to chimney top from chimney air flue entrance upper limb, and described heat transfer tube 4 is provided with tandem heat sink/sheet 12 and coating.Open or close corresponding stop valve 8, carry out the hot flue gas flue in left and right for hot-swap.
The warm flue gas of height before the desulfurization that the present invention utilizes boiler to produce, by air-introduced machine, the warm flue gas of height is incorporated in heat transfer tube, enter the gap between urceolus and inner core by pipeline through advancing mouth, by the air blanketing between urceolus and inner core and inner steel lining heating, thereby the wet flue gas in chimney can not adherent dewfall, has guaranteed that inner steel lining is not corroded.Even a small amount of flue gas enters the gap between urceolus and inner core, because interlayer is heated, the flue gas entered is impossible dewfall also, can not cause corrosion to urceolus and inner core, realizes that the integral body of chimney is anticorrosion.
In this embodiment, the flue after desulfurization can be arcuate structure, and the flue gas that enters chimney is rotated.Inner steel lining can arrange the helix structure identical with the flue gas direction of rotation.Flue gas forms rotation after entering chimney internal cylinder, has the aerodynamics characteristics of concentrated vorticity, and chimney can obtain better energy-conservation and environment protecting.
A kind of Anti-corrosive chimney that is provided with the barrel heater, chimney height 240m, as illustrated in fig. 1 and 2, it comprises urceolus 1 and inner core 10; Wherein urceolus 1 is reinforced concrete structure, and described inner core 10 is inner steel lining 2 and thermal insulation separation thermosphere 3.As shown in Figure 6, be provided with three groups of heat transfer tubes between described urceolus 1 and inner core 10, admittance hot liquid in heat transfer tube, the inlet of every group of heat transfer tube 4 is communicated with the liquid outlet of a heat exchanger 14 by pipeline, the liquid outlet of this heat transfer tube 4 is communicated with the inlet of heat exchanger 14 by pipeline, forms closed circuit; Described heat transfer tube 4 is provided with pump 15.Described heat exchanger 14 is positioned at the hot flue gas flue 9 before desulfurization, the warm flue gas of height before desulfurization is heated into high-temperature water by the water in heat exchanger 14, by pump 15, high-temperature water is circulated in heat transfer tube, forms heat transfer tube, gap between heating urceolus 1 and inner core 10
Be provided with thermal insulation separation thermosphere 3 between described inner steel lining 2 and urceolus 1.Described heat transfer tube 4 is arranged in the gap between this thermal insulation separation thermosphere 3 and inner steel lining, and two hot liquid pipeline goes out (entering) and is separately positioned on left and right flue entrance upper limb 1m height and position for total mouthful 13.Described heat transfer tube 4 extends to chimney top from chimney air flue entrance upper limb, and described heat transfer tube 4 is provided with tandem heat sink/sheet 12 and coating.Open or close corresponding stop valve 8, carry out the hot flue gas flue in left and right for hot-swap.
The warm flue gas of height before the desulfurization that the present invention utilizes boiler to produce, by pump 15, water is circulated in heat transfer tube, heat enters the gap between urceolus and inner core by heat transfer tube 4, by the air blanketing between urceolus and inner core and inner steel lining heating, heat chimney wall simultaneously, thereby the wet flue gas in chimney can not adherent dewfall, has guaranteed that inner steel lining is not corroded.Even a small amount of flue gas enters the gap between urceolus and inner core, because interlayer is heated, the flue gas entered is impossible dewfall also, can not cause corrosion to urceolus and inner core, realizes that the integral body of chimney is anticorrosion.
When certain flue need to overhaul, by controlling the switch of stop valve 8, thereby guarantee the heat transfer tube normal operation.
Other accessory structure and embodiment 1 roughly the same, are not repeating.
In this embodiment, the flue after desulfurization can be arcuate structure, and the flue gas that enters chimney is rotated.Inner steel lining can arrange the helix structure identical with the flue gas direction of rotation.Flue gas forms rotation after entering chimney internal cylinder, has the aerodynamics characteristics of concentrated vorticity, and chimney can obtain better energy-conservation and environment protecting.
A kind of be provided with the barrel heater without rotten dust-collecting energy-saving chimney, chimney height is 120m, urceolus is reinforced concrete structure, stack structure is similar to embodiment 1, its difference is: the corrosion-proof lining 5 that liner is brick setting, as shown in Figures 3 and 4; The air heat-insulation layer that gap between described urceolus 1 and inner core is width 100mm arranges thermal chimney road heating system in this air heat-insulation layer.What at chimney left and right flue entrance upper limb the heat transfer tube road is set respectively enters/exports total mouthful, and the connection of pipeline, layout and switching mode are identical with embodiment 1.
In this embodiment, the flue after desulfurization is arcuate structure, and the flue gas that enters chimney forms rotation.The brick liner structure helix structure identical with the flue gas direction of rotation.Flue gas enters the mobile aerodynamics characteristics with concentrated vorticity after chimney internal cylinder, except chimney does not have etching problem, also has well energy-conservation and environment protecting.
A kind of anticorrosion brick liner chimney that is provided with the barrel heater, the layout on the stack structure of the present embodiment and heat transfer tube road is identical with embodiment 3, difference is that the flue after desulfurization is the relative mode of entrance of traditional chimney, and chimney internal cylinder 10 does not have helix structure.
The content that above-described embodiment is illustrated should be understood to these embodiment only for being illustrated more clearly in the present invention, and be not used in, limit the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
Claims (2)
1. an Anti-corrosive chimney that is provided with the barrel heater, comprise urceolus (1) and inner core (10), it is characterized in that, between described urceolus (1) and inner core (10), is provided with at least one group of heat transfer tube (4); Described heat transfer tube (4) is provided with air-introduced machine (7), the mouth that advances of this heat transfer tube (4) is connected with the hot flue gas flue (9) before desulfurization by pipeline, the outlet flue of this heat transfer tube (4) is connected with the hot flue gas flue (9) before desulfurization by pipeline, forms closed circuit.
2. the Anti-corrosive chimney that is provided with the barrel heater according to claim 1, it is characterized in that, described inner core (10) is inner steel lining (2) or brick setting corrosion-proof lining (5), be provided with thermal insulation separation thermosphere (3) between inner steel lining (2) and urceolus (1), described heat transfer tube is arranged in the gap between this thermal insulation separation thermosphere (3) and inner steel lining (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210011677.6A CN102418933B (en) | 2012-01-16 | 2012-01-16 | Corrosion-resistant chimney with cylinder wall heating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210011677.6A CN102418933B (en) | 2012-01-16 | 2012-01-16 | Corrosion-resistant chimney with cylinder wall heating device |
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| CN102418933A CN102418933A (en) | 2012-04-18 |
| CN102418933B true CN102418933B (en) | 2014-01-08 |
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| CN201210011677.6A Expired - Fee Related CN102418933B (en) | 2012-01-16 | 2012-01-16 | Corrosion-resistant chimney with cylinder wall heating device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104132356A (en) * | 2014-07-30 | 2014-11-05 | 上海迪夫格环境科技有限公司 | Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam |
| CN104121593B (en) * | 2014-07-30 | 2017-08-08 | 上海迪夫格环境科技有限公司 | Integrated heat insulating block heating Wet chimney inner tube wall preventing and treating chimney rain, the device of gypsum rain |
| CN107702123B (en) * | 2017-09-29 | 2019-07-05 | 中冶东方工程技术有限公司 | The production method for keeping the temperature flue and keeping the temperature flue |
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| CN202432534U (en) * | 2012-01-16 | 2012-09-12 | 常熹钰 | Anti-corrosion chimney with barrel wall heating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09239235A (en) * | 1996-03-08 | 1997-09-16 | Ishikawajima Harima Heavy Ind Co Ltd | Highly concentrated sulfur oxides treatment apparatus |
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2012
- 2012-01-16 CN CN201210011677.6A patent/CN102418933B/en not_active Expired - Fee Related
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| JP2000336975A (en) * | 1999-05-28 | 2000-12-05 | Nkk Corp | Chimney |
| DE20103124U1 (en) * | 2001-02-22 | 2001-05-31 | Spasovsky Bogoljub | Device for heat recovery from flue gases in the chimney draft |
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Non-Patent Citations (1)
| Title |
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| JP平9-239235A 1997.09.16 |
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| CN102418933A (en) | 2012-04-18 |
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